Update NEWS file

Fixes #809

NEWS

+New in 3.0.1
+
+* Feature: Introduce Paperlip IO adapter.
+* Bug fix: Regression in AttachmentContentTypeValidator has been fixed.
+
+New in 3.0.0:
+
+* API CHANGE: Paperclip now requires at least Ruby on Rails version 3.0.0
 * API CHANGE: The default :url and :path have changed. The new scheme avoids
 * API CHANGE: The default :url and :path have changed. The new scheme avoids
   filesystem conflicts and scales to handle larger numbers of uploads.
   filesystem conflicts and scales to handle larger numbers of uploads.
 
 
   The easiest way to upgrade is to add an explicit :url and :path to your
   The easiest way to upgrade is to add an explicit :url and :path to your
   has_attached_file calls:
   has_attached_file calls:
-  
+
       has_attached_file :avatar,
       has_attached_file :avatar,
         :path => ":rails_root/public/system/:attachment/:id/:style/:filename",
         :path => ":rails_root/public/system/:attachment/:id/:style/:filename",
         :url => "/system/:attachment/:id/:style/:filename"
         :url => "/system/:attachment/:id/:style/:filename"
 
 
+* Feature: Adding Rails 3 style validators, and adding `validates_attachment` method as a shorthand.
+* Bug fix: Paperclip's rake tasks now loading records in batch.
+* Bug fix: Attachment style name with leading number now not raising an error.
+* Bug fix: File given to S3 and Fog storage will now be rewinded after flush_write.
+* Feature: You can now pass addional parameter to S3 expiring URL, such as :content_type.
+
 New in 2.7.0:
 New in 2.7.0:
 
 
 * Bug fix: Checking the existence of a file on S3 handles all AWS errors.
 * Bug fix: Checking the existence of a file on S3 handles all AWS errors.